Hafler DH-500 Question

[shinkamp]

Hello Knowledgeable Audioholics,

Due to a strange circumstance I came to look at my Hafler DH-500 amplifier today. I noticed that the front plate on the amplifier does not have an on/off switch. Almost all images of the DH-500 on the internet have an on/off switch with a red light on the front plate. I looked on the back and there is a small silver toggle switch by where the power cord comes out. I couldn't find any images of this on the internet. I toggled it up and down but the audio didn't seem to change. If the amp was shut off, would the audio continue to work? I don't have a preamp. My amplifier is wired to a high-end Yamaha RX-A3000 receiver. I guess I just assumed that there would be no sound when I toggled that switch. Can anyone shed some light on this for me?

Thanks.

shinkamp

 

[TLS Guy]

Hello Knowledgeable Audioholics,

Due to a strange circumstance I came to look at my Hafler DH-500 amplifier today. I noticed that the front plate on the amplifier does not have an on/off switch. Almost all images of the DH-500 on the internet have an on/off switch with a red light on the front plate. I looked on the back and there is a small silver toggle switch by where the power cord comes out. I couldn't find any images of this on the internet. I toggled it up and down but the audio didn't seem to change. If the amp was shut off, would the audio continue to work? I don't have a preamp. My amplifier is wired to a high-end Yamaha RX-A3000 receiver. I guess I just assumed that there would be no sound when I toggled that switch. Can anyone shed some light on this for me?

Thanks.

shinkamp

From what I can tell, Hafler made a PA version of that amp, which had no power switch. This is probably so it could get switched from a main control center, and they did not want the amp getting accidentally switched off. I have no idea what that rear switch is about, but I can be certain it is not a power switch.